thread-ring F# .NET Core #3 program

source code

(*  The Computer Language Benchmarks Game
    http://benchmarksgame.alioth.debian.org/

    Contributed by Jomo Fisher

    Uses F# asyncs. Asyncs are triggered by tailcall in sequence as progress is 
    made around the ring. 
*)
let ringLength = 503

let cells = Array.zeroCreate ringLength
let threads = Array.zeroCreate ringLength
let answer = ref -1

let createWorker i = 
    let next = (i+1)%ringLength
    async { let value = cells.[i]
            if false then () 
            match value with
            | 0 -> answer := i+1
            | _ -> 
                cells.[next] <- value - 1 
                return! threads.[next] }
    
[<EntryPoint>]
let main args = 
    cells.[0] <- if args.Length>0 then int args.[0] else 50000000
    for i in 0..ringLength-1 do 
        threads.[i]<-createWorker i

    let result = Async.StartImmediate(threads.[0])
    printfn "%d" !answer
    0

notes, command-line, and program output

NOTES:
64-bit Ubuntu quad core
2.0.2 a04b4bf512
"System.GC.Server": true


Thu, 09 Nov 2017 01:09:00 GMT

MAKE:
cp threadring.fsharpcore-3.fsharpcore Program.fs
cp Include/fsharpcore/tmp.fsproj .
cp Include/fsharpcore/runtimeconfig.template.json .
mkdir obj
cp Include/fsharpcore/project.assets.json ./obj
cp Include/fsharpcore/tmp.fsproj.nuget.g.props ./obj
cp Include/fsharpcore/tmp.fsproj.nuget.g.targets ./obj
/usr/bin/dotnet build -c Release --no-restore
Microsoft (R) Build Engine version 15.4.8.50001 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  tmp -> /home/dunham/benchmarksgame_quadcore/threadring/tmp/bin/Release/netcoreapp2.0/tmp.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:09.03

9.57s to complete and log all make actions

COMMAND LINE:
/usr/bin/dotnet ./bin/Release/netcoreapp2.0/tmp.dll 50000000

PROGRAM OUTPUT:
292